Top Gun cast and leads on aircraft landing all over the world (6)
I believe the answer is:
global
'world' is the definition.
(I've seen this before)
'top gun cast and leads on aircraft landing' is the wordplay.
'top' indicates taking the first letters.
'cast' becomes 'lob'.
'and' means one lot of letters go next to another.
'leads on aircraft landing' becomes 'al' (I can't justify this - if you can you should believe this answer much more).
The first letter of 'gun' is 'g'.
'g'+'lob'+'al'='GLOBAL'
'all over the' is the link.
This may not be right. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for global that I've seen before include "Comprehensive" , "All-encompassing" , "Like big village" , "Of the whole world, worldwide" , "Universal" .)